Rod straightening machine



I 7 Re. 1 ,445 J. E. SCHMIDT ET AL I ROD STRAIGHTENING MACHINE originalFiled 1921 2 Sheets-Sheet l Oct. 26 1926.. 3,, 16,445

J E. SCHMIDT El" AL ROD STRAIGHTENING IACHINB Original Filed 5. 19212-Sheets-$heet 2 Reissued Get. 26, E926.

ljidi'l E STATES 'Irl' SCIUMHDI AND CLYDE E. MGAETLHUR, OF CHICAGO,ILLILiiOTS.

ROD-STRAIGHTENIITG MACHINE.

Brights No. 1418;028, dated May 30, 1922, Serial No. 519,935, filedDecember 5, 1921. Application for reissue filed June 21, 1923.

This invention has relation to machines for straigl'itcning rods ofvarious sizes, and it consists in certain peculiarities of theconstruction, novel arrangement and combination of the various partsthereof as will be hereinafter more fully set forth and specificallyclaimed.

The principal object of our invention, is to furnish a rod straighteningmachine of simple and inexpensive construction, of great dr oility andstrength, positive and highly efficient in operation, as well as onewhich shall be extremely easy to operate and in which the operationthereof and the feeding of rods thereto may be performed by one persononly.

Another object is the provision of a. mach as of the character abovereferred to, which shall be of such construction and arrangement of itsparts, that the operation of straightening rods thereby will beperformed by the impact thereon of a movable die or member cooperatingwith a complemental fixed die or member, as the rods are fed betweensaid Other objects and advantages of the invention will appear from. thefollowing description and explanation.

In the accompanying drawings, which serve to illustrate an embodiment ofthe invention Fig. 1 is a view in side elevation partly in section of amachine embodying our imp *ovements, showing the movable or impact 'athereof, as well as the piston of the cylin in its raised position. 2 isa cenai vertical sectional view taken on line ;2 of Fig. 1 looking inthe direction indiby the arrows. Fig. 3 is a bottom plan Notional viewtaken on line 3-3 of Fig. 2. Fig. d is a plan view taken on line 44 ofFig.3. 2. Fig. 5 is a detached perspective View of one of the rodstraightening dies, and Fig. 6 is a frag'mental sectional View of one ofsaid dies showing the manner of de tachably securing an insert thereto.

Lilte numerals of reference refer to corresponding parts throughout thedifferent views of the drawings.

Referring now more particularly to Figs. 1 and 2 of the drawings, thereference numeral 1O designates the base of the machine, which may be ofany suitabe size, form and material, but by preference rectangular inshape and provided on its lower surface with Serial No. 646,925.

a series of spaced depending ribs 11 for the purpose of reinforcing saidbase. Mounted on the upper surface of the base and secured thereto bymeans of screw bolts 12, is an upright guide member which is designatedas a whole by the reference numeral 13, and com-- prises a horizontallydisposed base 11-1 at its lower end from which is upwardlyextended apair of spaced parallel guides 15 for cooperation with a portion of themovable or impact die of the machine.

The base 14: of the guide member 13 also has upwardly extended therefroma number of vertically disposed uprights 16 which terminate at theirupper ends on a horizontal line about flush with the upper surface ofthe stationary die. The upper ends of the guides .15 are united by atransverse portion 17 from which is upwardly ext nded a rib 18 on theupper end of which is located or formed a horizontal top 19 as will berec-lily understood by reference in Figs. 1 and 2 of the drawings. Theouter faces of the uprights 16 and guides 15 are provided withtransversely disposed circular recesses 20 which as shown arehorizontally aligned and are for the purposes to be presently explained.

Mounted on the upper surface of the base 10 near the opposite sidethereof from the guide 18 is another guide member, w ich. designated asa whole by the numeral :51 and is T-shaped in cross-section as shown.The guide member 21 has a floor 22 at its lower end to rest on the base10 to which it secured by means of screw bolts or otherwise. The upperend of the guide member 21 is provided with-a horizontally disposed top24 which lies flush with the top or portion 19 of the guide member 13and together with said portion 19 supports the base plate or lower headplate 25 of a vertical cylinder 26 which may be secured at its lower endto said plate by means of screw-bolts 27 e:. tended through suitableopenings in an annular flange 28 on the cylinder 26 and into suitableopenings in the plate 25, which latter plate is secured in any suitablemanner to the portions 19 and 24 of the guide members 13 and 21respectively.

Mounted on the upper end of the cylinder 26 and secured to an annularflange 29 by means of screw bolts 30, is the base 31 of the valve casing32 which has communication through a pipe 33 with a supply of compressedui r or other motive fluid not shown. 'lhis \ulre casing hasleadingtl'lQlfOfl'OII'l base an inlet port 84 which co1n- Mth a. port.3-15 with which the cylinder is provided in its wall. As shown, the purl535 extends to a point near the bottom of the cylinder and communizs ataid point with the cavity thereof. e casing 332 is also provided with anoutlet port 236 which communicates at one oi its ends with an outletport 37 with \rhicl'i the cylinder 26 is provided in the upper portionof its wall.

i-ietwceu the adjacent ends of the ports 34 and 535, the base 31 of thevalve casing is tcd with an exhaust port 38 which leads from the cavityof said casing to the atmosphere. Slidably mounted in the cavity of thecasing is a valve 39 which has in its lower surface a port or recess 40of sutiicientlength to encompass the exhaust port 38 and the outlet port36, or the inlet port 2-54 and the exhaust port 38, alternately. Theupper surface of the valve 89 is provided with a concave recess 41 forthe reception of the rounded end of an arm 42 extended from a sleeve 43which is fixed on a rocker 44 horizontally journaled in the valve casing32 and extended outwardly thereof at one of its ends. Mounted on theoutwardly extended portion of the rocker bar 44 is a hand lever 45 bymeans of which said bar can be turned in the proper direction to causethe-valve 89 to cooperate with the ports of the valve casing so as toadmit motive fluid to the cylinder or to be exhausted therefrom. At:opposite sides the valve casing 32 is provided with a stop rod 46 whichrods are extended into the valve casing at either end of the valve 89and may be employed for restricting its movements.

Slidably mounted in the cylinder 26 is a piston 47 which has downwardlyextended therefrom a piston rod 48 which passes through a suitableopening in the base plate 25, which plate is equipped on its lowersurface with a stufling box 49 which surrounds the rod 48 and may be ofthe usual or ordinary construction. It will be noted, by reference toFig. 1, that the lower end of the inlet channel or port 35 communicateswith the cavity of the cylinder at a slight distance above the bottomthereof, and'that the outlet channel 37 communicates with the cavity ofthe cylinder at a slight distance below the top thereof. By thisarrangement air cushions will be provided at the ends of the cylinder soas to prevent the piston 47 striking them and thereby causing injury tothe same. f

Mounted transversely on the base 10 between the adjacentsurfaces of theguides 13 and 21, is a die or rod-straightening member, which isdesignated as a Whole by the numeral 50, see Figs. 2, 4 and 5 of thedrawings. This die 50 and the impact or inn-w ahlc die of the nuzchiuc,whit-h is designated as a whole by the numeral 51, are, on theiradjacent surfaces, con'ilileinei'itary to each other and on theiradjacent sin-faces, their coustructions are counterparts of one another.In Fig. 5 is shown a perspective view of the die 50, from which view itwill be understood that the same is in the form of an elongnted block ofrectangular shape in outlines, and that it is provided at each of itssides with a plurality of spaced. upwardly extended parallel arms 52,the arms on one side of the die being arranged in coincidence with thespaces between the arms on. the other side of the d e. These arms havetheir upper inner surfaces inwardly and downwardly beveled as at 53,which beveled portions intermediate their ends have angular recesses 54,which recesses extend longitudinally throughout the length of the dieand are for the reception of an insert of a shape and size incross-section to lit snugly in said recesses. 'lhis insert provided inits surface adjacent the beveled faces of the arms 52, with alongitudinally extended angular rec ss 56, the angles of w nch recesscoincide with the inclined faces 53 of the arms of the die. The inserthas at each of its ends a down-turned apertured tongue or flange 57,which are seated in countersunk recesses 58 in the ends of the die 50,see Figs. and 6, and said tongues are secured in place by means ofscrewbolts 59 extended through the openings in said tongues and engagingopenings in the ends of the said die. The die 50 is secured to the base10 on which it rests by means of screw-bolts 60 extended upwardlythrough the base and engaging suitable openings in the bottom of the dieas will be observed by reference to Figs. 1 and 2. The 'uides and 21 arespaced from the sides of the die 50 and perform no function with respectthereto except to guide the movable die 51 so that it will cooperateaccurately with the stationary die. As before stated, the impact ormovable die 51 is, on its surface adja cent the die 50, a counterpart inconstruction, and the above description with reference to the die 50, isbelieved to accurately describe the lower surface of the die 51, exceptthat it will oe understood that the arms 52 of the die 51 are extendeddownwardly and that the beveled faces 53 of said arms as well as theangular recess 56 of the insert. 55, are extended upwardly instead ofdownwardly. The die 51 has at one of its side walls an outward extension61 which is provided in its outer surface with a recess 62 to -co-a-ctwith the adjacent port-ion of the guide member 21 so as to permit ofvertical movement of the movable die. The opposite side wall of this dieis provided with an outward extension 63 which has m in IUD about midway between its ends a lateral projection 64; which fits snugly betweenthe adjacent surfaces of the guide members of the guide 1.25. Thislateral projection G l may have mounted on the lower portion of one ofits sides a cutting member or die 65 to co-act with a cutting member 66,see Figs. 2 to 4, mounted on the surface of one of the members 15adjacent the projection ca for the purpose of cutting off rods which maybe placed in the recesses in the lower portion of the outer faces of themembers of the guide 13, as will be readily understood by reference toFigs. 1, and 2, of the drawinn-e The impact or movable die 51 is pro vidd on. its upper surface with a vertically apertured boss (3'7, in whichaperture the lower end of the piston rod may be secured in any suitablemanner. The outer face of the guide 21 is provided on the lower portionthereof with a pair of laterally extended spaced projections 68 whichprovide a recess 69 into which recess a portion of a rod which has beenbent into loop form can be placed, while the other member of the loopwill extend above or below one of the projections 68, when by moving therod upwardly or downwardly, it is evident the loop can be straightenedto such an extent that the rod can be placed in the square orrectangular opening provided by the complementary dies of the machine.

The construction and arrangement of the members of these dies are suchthat the arms 52 of one of them will fit and operate in the spacesbetween the arms of the other die, so that in the reciprocation of thepiston in the cylinder, the movable die will be caused to telescope withthe fixed die, in which oporation it will be understood that the squareopening between said dies will be maintained in such form but will bediminished in size according to the distance downwardly that the movabledie may be forced.

By nlacing an imperfect or bent rod longitudinally in the openingbetween the dies and permitting it to rest on the adjacent inclinedfaces of the stationary die and in the recess 56 of'the lower insert, itis manifest that by turning the hand lever in the proper direction topermit compressed air or steam to pass from the valve chamber 32 throughthe ports 36 and 37 into the upper end of the cylinder, the piston 47and the movable die 51 which it carries, will be moved downwardly withgreat force against the rod, positioned as above stated, which operationwill remove all of the kinks. and bends of that portion of the rodexposed to the action of the dies.

As the die members will be subjected, mainly, to the Wear and stressincident to the operation of the machine, at the apeXes of their angularsockets, we employ the inserts which .are by preference made ofmanganese steel, but may be of any other suitable material, whichinserts are detachably mounted on the dies so as to permit them to beremoved and replaced if necessary.

In this machine, the straightening action is produced by bringing theopposing series of faces together, the dies being formed to alternatelyengage and bend the metal in directions substantially 90 apart and adis-- tinguishing characteristic of the invention is that the opposingelements are transversely aligned so that the rod will be engaged atpoints disposed oppositely of one another and, as a result of thisarrangement, the dies will straighten 'the rod without any shearingaction between adjacent die elements. Furthermore, they do not tend toform waves in the rod as will occur when the opposing die-faces areoffset and contiguous.

Having thus described the invention, what we claim as new and desire tosecure by Let ters Patent, is:

1. In a machine of the class described, the combination of a pair ofdiemembers, each having a pair of series of die-faces, the faces of oneseries of each member being rela tively inclined and staggered withrespect to the faces of the other series on the same member, each seriesof faces of each of the members being transversely aligned and parallelwith and opposed to a series of faces on the other die-member, the facesof each series of each of the members being spaced apart to receivebetween them diefaces of a serieson the other member, and means forshifting one of the members rela tively to the other and in arectilinear path to maintain at all times the parallelism of the opposedfaces.

2. In a machine of the class described, the combination of a pair ofdie-members, each having a pair of series of die-elements havingrelatively inclined faces, one series of die-faces of each member beingopposed and extending parallel to one series of die-faces on the othermember, the elements of each series being spaced apart and transverselyaligned, the elements of one series of each member alternating with theelements of the other series on the same member to form spaces toreceive the elements on the other member, mechanism for reciprocatingone of the members relatively to the other and in a rectilinear path soas to maintain all times the parallelism of the opposed diefaces.

3. In a machine of the class described, the combination of a frameprovided with a rectilinear guide-way, a die-member fixedly mounted onthe frame and at one end of the way, a die-member movably mounted andguided by said way in a rectilinear path, said die-members each having apair of series of die-faces, the faces of one series of each memberbeing relatively inclined and stagillgored with respect to the faces ofthe other series on the same member, each series of faces of each of themembers being transwly aligned and parallel with and oppa, d to a seriesof faces on the other diemenilici', the faces of each series of each ofthe members l. cing spaced apart to receive between their]. dic-taces ofa series on the other member, and means for reciprocating the movablemember.

i. .in a machine of the class described, the combination with a fixeddie member, of a die member movable with respect thereto, said membersbeing constructed to form coinplemcntal opposed angular sockets toembrace a rod and to telescope one with the other an insert seated ineach moi her at the apex of its socket and having an angular recess withits Walls coinciding with the Walls of the socket, ani means toreciprocate the movable member.

5. In a machine of the class described, the combination with afixed diemember, of a die member movable with respect thereto said members beingconstructed to form rcnnplemcntel opposed angular sockets to embrace arod and to telescope one with the other, an insert detachably seated ineach member at the apex of its socket and hav ing an angular recess withits Walls coinciding; with the walls of the socket, and means toreciprocate the movable member.

6. In a machine of the class described, the combination with a mainframe provided With a guide-Way, of a die member fixedly mounted thereonat one end of said Way, a die member movably mounted and guided by saidWay, said die members having on the adjacent portions transverselydisposed spaced arms, the arms at each side of each die member beingalternately disposed and opposed and having their adjacent facesinclined in opposite directions at angles to one another, the arms ofone of said members adapted to intermesh or telescope with the arms ofthe other member, the arms of said members being, provided withcomplemental longitudinally extended opposed angular sockets to embracerod, and means connccted to the movable die member for reciprocating thesame.

7. In a machine of the class described, the combination with a mainframe provided with a guide-Way, of a die member fixedly mounted thereonat one end of said Way, a die member movably mounted in and guided bysaid Way, said die members having on their adjacent portionstransversely disposed spaced arms, the arms of one of said membersadapted to inter-mesh or telescope with the arms of the other member,the arms of said members being provided with complemental longitudinallyextended opposed angular sockets to embrace a rod, an insert seated ineach member at the apex of its socket and having an angular recess Withits Walls coii'iciding with the Walls of the socket, and means toreciprocate the movable member.

S. In a machine of the class described, the cmnbination with a mainframe provided with a guide-Way, of a die member fixedly mounted thereonat one end of said Way, a die member movably mounted in and guided bysaid Way, said die members having on their adjacent portionstransversely disposed spaced arms, the arms at each side of each diemember being alternately disposed and opposed and having their adjacentfaces inclined in opposite directioi'is at angles to one another wherebycomplemental longitudinally extended opposed angular sockets to embracea rod are provided and whereby the arms of one of the die members areadapted to intermesh or telescope With the arms of the other member, andmeans to reciprocate the movable die member.

9. In a machine of the class described, the combination with a mainframe provided with a vertical guide-Way, of a die member fixedlymounted on the frame at the lower end of said Way, a die member movablymounted in and guided by said Way, said die members having on theiradjacent surfaces at each of their sides transversely disposed spacedarms, the arms at each side of each die being alternately disposed andhaving their adjacent faces inclined in opposite directions at angles toone another whereby complemental longitudinally extended opposed angularsockets to embrace a rod are provided and whereby the arms of one of thedie members are adapted to intermcsh or telescope With the arms of theother member, a cylinder vertically mounted on the main frame above theguide-way thereof, a piston slidable in said cylinder and having connection with the said movable die member, and means to reciprocate thepiston.

Signed at Chicago, Illinois this 24th day of May, 1923.

JOHN E. SCHMIDT. CLYDE n McARTHUR.

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